#!/usr/bin/env bash

# Copyright 2019 Istio Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

set -e
set -u
set -o pipefail

# $snippet curl_foo_bar_legacy syntax="bash" outputis="text"
#nolint
$ for from in "foo" "bar" "legacy"; do kubectl exec $(kubectl get pod -l app=sleep -n ${from} -o jsonpath={.items..metadata.name}) -c sleep -n ${from} -- curl http://httpbin.foo:8000/ip -s -o /dev/null -w "sleep.${from} to httpbin.foo: %{http_code}\n"; done
# $verify
sleep.foo to httpbin.foo: 200
sleep.bar to httpbin.foo: 200
sleep.legacy to httpbin.foo: 200
# $endsnippet

# $snippet verify_initial_policies syntax="bash" outputis="text"
$ kubectl get policies.authentication.istio.io --all-namespaces
# $verify
NAMESPACE      NAME                          AGE
istio-system   grafana-ports-mtls-disabled   ?
# $endsnippet

# $snippet configure_mtls_destinationrule syntax="bash"
$ cat <<EOF | kubectl apply -n foo -f -
apiVersion: "networking.istio.io/v1alpha3"
kind: "DestinationRule"
metadata:
  name: "example-httpbin-istio-client-mtls"
spec:
  host: httpbin.foo.svc.cluster.local
  trafficPolicy:
    tls:
      mode: ISTIO_MUTUAL
EOF
# $endsnippet

# $snippet curl_foo_bar_legacy_post_dr syntax="bash" outputis="text"
#nolint
$ for from in "foo" "bar" "legacy"; do kubectl exec $(kubectl get pod -l app=sleep -n ${from} -o jsonpath={.items..metadata.name}) -c sleep -n ${from} -- curl http://httpbin.foo:8000/ip -s -o /dev/null -w "sleep.${from} to httpbin.foo: %{http_code}\n"; done
# $verify
sleep.foo to httpbin.foo: 200
sleep.bar to httpbin.foo: 200
sleep.legacy to httpbin.foo: 200
# $endsnippet

# $snippet httpbin_foo_mtls_only syntax="bash"
$ cat <<EOF | kubectl apply -n foo -f -
apiVersion: "authentication.istio.io/v1alpha1"
kind: "Policy"
metadata:
  name: "example-httpbin-strict"
  namespace: foo
spec:
  targets:
  - name: httpbin
  peers:
  - mtls:
      mode: STRICT
EOF
# $endsnippet

# Disable errors, since the next command is expected to return an error.
set +e
set +o pipefail

# $snippet curl_foo_bar_legacy_httpbin_foo_mtls syntax="bash" outputis="text"
#nolint
$ for from in "foo" "bar" "legacy"; do kubectl exec $(kubectl get pod -l app=sleep -n ${from} -o jsonpath={.items..metadata.name}) -c sleep -n ${from} -- curl http://httpbin.foo:8000/ip -s -o /dev/null -w "sleep.${from} to httpbin.foo: %{http_code}\n"; done
# $verify
sleep.foo to httpbin.foo: 200
sleep.bar to httpbin.foo: 200
sleep.legacy to httpbin.foo: 000
command terminated with exit code 56
# $endsnippet

# Restore error handling
set -e
set -o pipefail
